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<a name="boost.interprocess.null_index"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template null_index</span></h2>
<p>boost::interprocess::null_index</p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../interprocess/indexes_reference.html#header.boost.interprocess.indexes.null_index_hpp" title="Header &lt;boost/interprocess/indexes/null_index.hpp&gt;">boost/interprocess/indexes/null_index.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> MapConfig<span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="null_index.html" title="Class template null_index">null_index</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="keyword">int</span> <span class="special">*</span>       <a name="boost.interprocess.null_index.iterator"></a><span class="identifier">iterator</span><span class="special">;</span>      
  <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">*</span> <a name="boost.interprocess.null_index.const_iterator"></a><span class="identifier">const_iterator</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="null_index.html#boost.interprocess.null_indexconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="null_index.html#idm26151-bb"><span class="identifier">null_index</span></a><span class="special">(</span><a class="link" href="segment_manager_base.html" title="Class template segment_manager_base">segment_manager_base</a> <span class="special">*</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="null_index.html#idm26134-bb">public member functions</a></span>
  <span class="identifier">const_iterator</span> <a class="link" href="null_index.html#idm26135-bb"><span class="identifier">begin</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="identifier">iterator</span> <a class="link" href="null_index.html#idm26139-bb"><span class="identifier">begin</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="identifier">const_iterator</span> <a class="link" href="null_index.html#idm26143-bb"><span class="identifier">end</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="identifier">iterator</span> <a class="link" href="null_index.html#idm26147-bb"><span class="identifier">end</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id-1.3.19.17.3.31.4.4"></a><h2>Description</h2>
<p>Null index type used to save compilation time when named indexes are not needed. </p>
<div class="refsect2">
<a name="id-1.3.19.17.3.31.4.4.3"></a><h3>
<a name="boost.interprocess.null_indexconstruct-copy-destruct"></a><code class="computeroutput">null_index</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="idm26151-bb"></a><span class="identifier">null_index</span><span class="special">(</span><a class="link" href="segment_manager_base.html" title="Class template segment_manager_base">segment_manager_base</a> <span class="special">*</span><span class="special">)</span><span class="special">;</span></pre>Empty constructor. </li></ol></div>
</div>
<div class="refsect2">
<a name="id-1.3.19.17.3.31.4.4.4"></a><h3>
<a name="idm26134-bb"></a><code class="computeroutput">null_index</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_iterator</span> <a name="idm26135-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>begin() is equal to end() </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">iterator</span> <a name="idm26139-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>begin() is equal to end() </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">const_iterator</span> <a name="idm26143-bb"></a><span class="identifier">end</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>begin() is equal to end() </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">iterator</span> <a name="idm26147-bb"></a><span class="identifier">end</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>begin() is equal to end() </p>
</li>
</ol></div>
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        Distributed under the Boost Software License, Version 1.0. (See accompanying
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